#2 Fetch before tracking remote branch

src/Handler.php

@@ -115,11 +115,11 @@ class Handler {
       $fs->mkdir($path);
       $repository->init();
       $repository->addRemote('origin', $uri);
-      $repository->getCaller()->execute('branch --set-upstream-to origin/' . $version . ' ' . $version);
     }
 
     $repository->fetch();
     $repository->checkout($version);
+    $repository->getCaller()->execute('branch --set-upstream-to origin/' . $version . ' ' . $version);
   }
 
 }